• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1433089 Induction heated converter UDDEHOLMS AB 11 March 1974 [12 March 1973] 10799/74 Heading F4B [Also in Divisions H5 and C7] A converter for treating molten metal with a gas/solid suspension or other fluid comprises at least one tuyere 14 below the melt surface when the converter is in its vertical position, a freeboard height 18 at least equal to the depth of the melt during operation, at least one induction heating zone 8a spaced away from the converter and having at least one channel in liquid communication with the converter at a level below the melt surface so that a temperature gradient between the heating zone and body of the melt can be established, the refractory lining in the heating zone being thinner than in the body of the converter. The tuyere may be displaced from the plane of symmetry C to provide vigorous stirring and may be positioned in the region of the flow of hot metal from the heating zone so that any solid substances or carrier fluid entering the melt does not enter the heating zone which may consist of a simple extension of the converter or at least one water cooled loop 8 encircled by windings 12 and containing liquid channel 8a, refractory lining 8b and entering the converter at 9 and 10. The converter may comprise a tap hole 15 and may be dimensioned such that it can be tilted to a position such that it contains the whole volume of the molten metal to be treated and the opening of the tuyere or tuyers and heating channels are exposed above the melt surface.
    公开号:SU725571A1
    申请号:SU2011875
    申请日:1974-03-11
    公开日:1980-03-30
    发明作者:Эберг Карл-Эрик；Гуннар Норберг Ларс
    申请人:Уддехолмз Актиеболаг (Фирма)；
    IPC主号:
    专利说明:

    each other, the openings of the induction channel a are located at the same level. In FIG. 1 depicts an 11RedLag e1 and oe device; in fig. 2 shows section A-A in FIG. 1. The container in the form of converter 1 has side walls 2 and an inclined bottom 3. The converter contains a steel case 4, lined from the inside with refractory lining 5 and trunnions 6 and 7, which are mounted on liners (not shown) so that The rotor can be rotated around an axis passing through pins 6 and 7. The induction channel 8 in the form of a bypass has two openings 9 and 10 in the side wall 2 of the converter. The holes 9 and 10 are located 15 at the same level 11 of the side wall 2 slightly above the junction of the side wall and the lower edge of the inclined bottom 3. The induction channel 8 is wrapped with induction ring coils in the form of a winding 12 20 for induction heating and has a lining 13 with water cooling, which is much thinner than the converter lining, which ensures high, efficient induction heating. The tuyere 14 is located at the upper end of the inclined bottom 3 and its axis is perpendicular to the inclined bottom, but is offset from the plane of symmetry to provide an asymmetric position, causing significant movement of the metal without splashing during the process. At the top the converter has a throat: fault 15. There is an opening 16 in the side wall, which is covered by a gate valve 17. The operation of the device is as follows. For refining, the molten metal is poured into the converter through the throat 40. The temperature of the molten metal can be increased by adjusting the power supplied to the induction winding 12 of the electric power. After reaching a predetermined temperature, 45 reagents are introduced through the lance 14. If the reagent is a suspension of powder and gas, then it is pre-prepared in a special device and fed through a pipeline to the lance 14. Lance 14 50 is directed to the point above channel 8 This, together with the appropriate rate of introduction of the reagents, ensures the rapid movement of the metal outside the channel 8, while neither the powder nor other agents from the tuyere enter the channel. The solidification of the metal in the tuyere is eliminated due to the influx of heat from the channel 8. The temperature of the molten metal is controlled and, if necessary, controlled 60 by changing the power of the electric power supplied to the induction winding 12. After the metal treatment is completed, the introduction of the reagents is interrupted. 25, the converter turns in such a way that the metal is discharged from the exhaust port (-in 16. During this operation, it is preferable to introduce an inert gas flow (possibly using air or azo jjjj others) through the tuyere located above the surface of the molten metal. Before release, the slag is usually removed through the neck 15, while the blast through the tuyere 14 promotes its removal. Usually the molten metal remains in the channel 8 and at the bottom of the converter. The following is a specific example of refining pig iron in the proposed apparatus: Molten metal, such as molten pig iron, is poured into a converter. The powder for refining is used in the following composition, weight. about/. calcium oxide 80 and iron oxide 20. 1.08% of the weight of the mixture of the powder particles had dimensions greater than 1 mm and 14.58% less than 0.06 mm, and 84 - 34% of the mixture contained particles of 0.06-1 , 00mm. In this mixture there were no particles exceeding the size of 1.5 mm. 5 tons of molten molten iron were poured into the converter and induction heating was started, and a stream of argon was introduced through the lance 14, the flow rate of which was 4 liters per minute. Under the influence of heat from the electric power supplied to the induction winding 12, the temperature of the pig iron in the converter increased. When the temperature reached 1500 ° C, a mixture of calcium oxide and iron was supplied through a pipeline to the lance 14 and introduced through it into the molten metal. In this way, 170 kg of a mixture of calcium and iron oxides were introduced into liquid iron for 15 minutes. The temperature of the molten iron during the process was monitored and maintained approximately constant by adjusting the power of the electric power supplied to the induction heater. At the end of the process, the temperature of the pig iron was 1497 ° C. After insertion of the powder-like materials, argon purging was carried out for 15 minutes, then the converter was inclined, and the metal was released through the outlet 15. The introduction of powder dispersed in the carrier gas caused significant cooling of the molten metal in the lance area, but these thermal losses are compensated by displacement the flow of superheated metal in the induction channel; By regulating the power of the supplied electricity to the induction channel, it is possible to obtain a metal overheating in the induction channel 50–200 ° C higher than temperature of the metal in the converter. Due to this, an effective heat exchange between the metal in the channel and the main mass of the metal in the converter is achieved. Besides,
    Since the lance 14 is directed above the holes 9 and 10, the superheated metal in the induction channel is replaced with the cooler of the converter volume, including metal cooled by reagents introduced through the lance 14, which also contributes to better heat transfer between the induction channel and the mass of metal in the converter. Superheated metal from the induction channel is rapidly distributed throughout the mass of the metal in the converter, which is very important for the metallurgical processes in the bath.
    The advantage is that, in the interaction between the superheated metal in the induction channel and the reagents introduced through the lance 14, the superheated metal prevents the metal from hardening in the inlet of the tuyere, while cooling the reagents prevents the lining adjacent to the holes 9 and 10 dripped and the lining in this area does not collapse too quickly.
    Making the bottom obliquely in the direction of the induction channel allows the metal to be removed from the converter, leaving part of it in the induction channel.
    Thus, the proposed design solutions provide improved metal refining and improved device performance.
    权利要求:
    Claims (6)
    [1]
    1. A device for refining metal with gaseous and powdered reagents, containing a housing lined with refractory material with a throat and an outlet in the side wall, a lance with a nozzle installed) in the housing laying with the possibility of blowing metal below the melt level, and driving the housing about the horizontal axis, characterized in that, in order to improve metal refining and increase productivity, it is equipped with an induction channel, made in the form of a bypass, communicating with the cavity lined hull.
    [2]
    2. A device according to claim I, characterized in that the inlet to the induction channel is located below the cut of the tuyere nozzle.
    [3]
    3. The device according to paragraphs. 1 to 2, characterized in that its bottom is made inclined towards the induction channel.
    [4]
    4. Device on PP. 1-3, characterized in that the geometrical axes of the tuyere and the induction channel intersect each other.
    [5]
    5. Device on PP. 1-3, characterized in that the tuyere nozzle and the outlet of the induction channel are opposite each other.
    [6]
    6. The device according to paragraphs. 1 and 2, characterized in that the openings of the induction channel are located at the same level.
    Sources of information taken into account in the examination
    1. USSR author's certificate number 353966, cl. From 21C 5/42, 1970.
    2. The patent of Germany No. 1965057, cl. 18B 5/48, 1969.
    / 7
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    同族专利:
    公开号 | 公开日
    DE2411507A1|1974-09-26|
    FR2221521A1|1974-10-11|
    ZA741560B|1975-02-26|
    CA1015013A|1977-08-02|
    GB1433089A|1976-04-22|
    JPS5651218B2|1981-12-03|
    PL90997B1|1977-02-28|
    NO132595B|1975-08-25|
    JPS5047802A|1975-04-28|
    CS196250B2|1980-03-31|
    BR7401856D0|1974-12-03|
    AT337237B|1977-06-27|
    SE371211B|1974-11-11|
    FR2221521B1|1977-09-23|
    LU69603A1|1974-07-10|
    BE812202A|1974-09-12|
    IN141752B|1977-04-09|
    NO132595C|1975-12-03|
    US3918692A|1975-11-11|
    NL7403330A|1974-09-16|
    ES424151A1|1976-06-01|
    SU725571A3|1980-03-30|
    AU6652674A|1975-09-11|
    DE2411507C2|1985-07-11|
    IT1007646B|1976-10-30|
    ATA202674A|1976-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1031257A|1909-10-25|1912-07-02|Albert E Greene|Process and apparatus for extracting and refining metals and alloys.|
    US1769223A|1922-08-23|1930-07-01|Ajax Metal Company|Electric furnace process and apparatus|
    US1958581A|1932-04-18|1934-05-15|Cass L Kennicott|Ore treatment|
    FR1125154A|1955-04-28|1956-10-25|Siderurgie Fse Inst Rech|Process for desulphurizing molten metals and in particular cast iron|
    DE2007373B2|1970-02-18|1973-05-03|Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg|PROCESS AND CONVERTER FOR MANUFACTURING FERRITIC CHROME STEEL|SE392479B|1974-03-20|1977-03-28|Asea Ab|FORMA AT METALLURGIC CONVERTERS AND MELTING OVEN|
    SE396226B|1974-09-20|1977-09-12|Asea Ab|KIT AND DEVICE FOR TREATMENT OF A METAL MELT|
    SE397684B|1974-10-29|1977-11-14|Asea Ab|METALLURGIC CONVERTER WITH FORM ACCORDING TO PATENT 7403730-0|
    SE424916B|1975-02-25|1982-08-16|Asea Ab|SET AND DEVICE FOR HEATING ELECTRICALLY NON-CONDUCTIVE MATERIAL IN INDUCTION OVEN|
    JPS5747735B2|1977-08-08|1982-10-12|
    JPS63186765U|1987-05-26|1988-11-30|
    US5177763A|1990-03-28|1993-01-05|Kawasaki Steel Corporation|Furnace bottom structure of direct current electric furnace|
    US5182079A|1990-07-17|1993-01-26|Nelson & Associates Research, Inc.|Metallic composition and processes for use of the same|
    US5055253A|1990-07-17|1991-10-08|Nelson & Associates Research, Inc.|Metallic composition|
    US5505798A|1994-06-22|1996-04-09|Jerry L. Nelson|Method of producing a tool or die steel|
    FR2726211B1|1994-10-31|1997-01-17|Seva|A POCKET FOR HEATING AND CASTING LIQUID METALS|
    DE19628339C1|1996-07-13|1998-01-08|Didier Werke Ag|converter|
    DE19736720C1|1997-08-19|1999-05-06|Mannesmann Ag|Metallurgical vessel|
    US20040135297A1|2002-06-15|2004-07-15|Barry Houghton|Electromagnetic induction apparatus and method of treatment of molten materials|
    KR101943088B1|2011-08-15|2019-01-28|콘삭 코퍼레이션|Electric induction melting assembly|
    SE537146C2|2012-05-08|2015-02-17|Uvån Holding Ab|Method for selective oxidation of one or more metals from iron melt|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7303382A|SE371211B|1973-03-12|1973-03-12|
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